Draper 4 piece impact screwdriver bit set draper 12542 8mm hexagon shank bits suitable for use with stock nos 22322 and 81519 impact screwdriver sets display packed br br b b br br pz type products are compatible with pozidriv 174 supadriv 174 fixing systems br pozidriv 174 supadriv 174 are registered trademarks of trifast plc draper 12542 4 piece impact screwdriver bit set